T-6004validated
Skill/Plugin Backdoor
Install a backdoored skill or plugin that persists across agent restarts
Tactic
Persistence (Stage 6)
Establish persistent access surviving restarts and session changes
Attack Class
SKILL-FRONTMATTER
Embedding malicious instructions in skill or plugin metadata and description fields
Evidence
validated
Reproduced in controlled lab environment (DVAA) with documented steps.
DVAA Validation
skill-backdoor-install
Detection (HackMyAgent)
SKILL-001SKILL-002SKILL-003SKILL-004SKILL-005SKILL-006
npx hackmyagent secure --ciDefense (OASB Controls)
OASB 8.1OASB 8.2OASB 8.3OASB 8.4
How to Cite
AI Agent Threat Matrix T-6004 (Skill/Plugin Backdoor). OpenA2A, 2026. https://threats.opena2a.org/techniques/T-6004